Improvement in blowing-engine valves



W. H. HARRISON. BLOWING ENGINE-VALVES.

Pate nt.ed Sept.l8,l877

will F m 38 A V f v v I I I A "Jill/621,505

' cation of myginvention WILLIAM H. lEiARRISON, or ivEWcAsrLE, PENNSYLVANIA.

f imrii'ovsmsu'r m Browne-enema i/Aintss.

Specification forming part pipette rs Patent 'No. {85,361, dated September 18, 1877 application filed 2 SON, of ,flewcastle, Lawrence county, Pennsylva-nia,,have Invented a new and useful Improvement in Valves and Valve-Seats for Blowing-Engines, of which the following is a specification! 1 ,Y The object-of my invention is-to provide a blowing-cylinder with sinipleand sensitivelyoperating inlet and discharge valves; and this objectiattain in the manner-which I will now proceed to describe, reference being had to the accompanying drawings, in'which- Figures land 2'are vertical sections of sumcient of a blowing-cylinder to illustrate my invention; Fig; 3, a perspective view of-Figs. land 2, showing the valves removed from ftheir chambers on the cylinder-cover; and Fig. 4, a perspective view, showing'a modiih A represents the upper portion of a blowjug-cylinder; B, the cylinder-cover; D .the-

piston; and E. the piston-rod, passing through a central stuflingfbox on-the cover.

The cylinder-cover has two valve-chambers, G and 'G, formed, in the present instance, by recessing the cover and securing plates I'-I above thereccsses, G is the outlet-chamber,

containing the discharge-valve. H, which, onf

the descent of the piston,bears on the bottom of the chamber and closes the outlet-opening a, as shown in Fig. 1; bnt,on the ascent of the piston, bears against the under side of, the

plate I and closes the central openings b in the said plate, as shown in Fig. 2, the compressed air escaping through the outlet-opening a, through the chamber G, and thence through the side openings or ports 0 c in the said plate I, to a'receiving-chest, (shown by dotted lines in Fig. 1,) where the cg npressed air'is directed by suitable pipes or ducts to any desired point. G is the inlet-chamber, containing a valve, H, which, when the piston rises, bears against the'nnder side of the.

plate I and closes the inlet-opening h inthe I 7 said plate, as shovi'n in Fig. 2, the valve, when the piston descends, falling to the bottom of thechamber, and bearing on the same and closing the opening 5, while the external air passes through the-opening it in the plate I, .th'enee vinto the chamber G, and thence,

' through side openingsjj in the bottom of the chamber, into the cylinder.

The valves may consist of leather, wood, or

metal, or of a combination of these materials,-

and may be guided laterally by lugs f f, projecting from the sides of the recess, or in any other suitable manner.

'It has not been deemed necessary to illustrate the valves at the lower or opposite end of the cylinder, as they are too similar, to those described above to need description.

* It will also be understood that, although 1' have shown in the present instanee but one inlet and one outlet valve in the cylindercover, there maybe as many of these valves at both ends of the cylinder as the diameter of the-latter may suggest,

; It is not essential that the valve ebambers should be formed in the covers of the cylindeaf as shown, "as chests containing the valves and having the openings described may be 'se cured to the covers."

I prefer to make the valve-chambers and valves of the quadrangular shape shown in Figs. 1, 2, and 3 but they may be of other fshapes, circular, for instance, as shown in.- Fig. 4. v p

. The opening b .in the plate I is not a-port for the -escape of compressed air from. the outlet-chem ber G, nor is the opening e in the bettbm of the chamber G a port for the ad v "mission of external air to the cylinder; but

these openings or ports constitute an essen tial feature of my invention, as they insure that sudden and sensitive action of the alves upon which the efiieient, uniform, and economical working of the blowing-'eng'inedcpends. This will 'be best understood by up posingthat there is no opening I) in the plate I, in which case, while the valve might operate, it would be more or less sluggish in its action,

Asregards the valve H, the opening iper mits the air under pressure to act on such anextended area of the valve that the prompt action ot' the latter must be assured. Among other advantages of my improvements may be mentioned the protection of the Q lemon valves hymnfiningthem incbambeu, general 'e iqliliity in oonitrlction, arid the sensibility of the valves.

I claim an my invention- 1 The within-described valve apparatus,

consisting of a valve-chamber and valve, an

air inlet on outlet; the central opening b or if end aide ports, for the passage of the air, all

substantially as set fa th.

2. The combination, in the cylhfder-eoven of any desired nnmber of valve-chambers,

eech-eheln ber eontaining'a valvemud having inlets: and ontlewand mdeteeheble odver,

snbstantially as described.

WILLIAM H. HARnIsQm Witnesses:

G10. BJBmmln, GEO. W. Human. 

